PSEUDO PLANE-STRESS MODE-II CRACK-GROWTH IN PLASTIC MATERIALS

The near tip field of mode II crack that grows in thin bodies with pow er hardening or perfectly plastic behavior is analyzed. It is shown th at for power hardening behavior, the pseudo plane stress field possess es the logarithm singularity, i.e. sigma similar to(ln r)(2/(n-1)), ep silon similar to(ln r)(2n/(n-1)), where r is the distance from the cra ck tip, n the hardening exponent that is epsilon similar to sigma(n). When n --> infinity the solution reduced to that for the perfectly pla stic case. (C) 1997 Elsevier Science B.V.